Thomas haeps



(No Model.) T HARPS GUARD FOR GUTTER HEADS.

No. 300,363. PatentedJune 17, 1884.

THOMAS HARPS, OF ROCHESTER, KEV? YORK, ASSIGNOR TO CONNELL 8r, DENGLER, OF SAME PLACE.

GUARD FOR CUTTER-HEADS.

SEEGIEIOATEGN forming part of Letters Patent No, 300,363, dated June 17, 188%.

Application filed June 16, 1882.

To (ZZZ whom it may concern:

Be it known that I, Tnonirs Hnnrs, of Rochester, New York, have invented an I111- proved Safety Attachment for Molding-Machines, of which the following is a specification, reference being had to the annexed drawings.

In the accompanying drawings, representing my invention, Figure 1 is a plan View. Fig. 2 is a side elevation. Fig. 3 is a front view. Fig. 4 is a detached view of the feet.

In the accompanying drawings, representing my improved safety attachment for mold ing-Inachines, A represents the table of the moldingnnachine; B, the molding-head; C, the base which supports my improved safety attachment on the table; D D, the uprights,

E, the crossbar; F, the sliding cross-piece;

G G, the springs, and H the guard. The work. is shown at I, Fig. 2, and the form at J in the same figure.

My improvement may be attached to molding-inachines or upright shapers of any ordinary form, the foot or base 0 being fastened to the table in suitable position with reference to the head by the belt a, Fig. 4, passing through the table. From the base 0 the posts or uprightsl) D project upward parallel to each other, being connected together at their upper ends by the cross-bar E.

On the upright posts 1) 1) slides the crosspicce F, which is arranged to be moved up and down on the posts by the threaded red I), which screws through a nut in the cross-bar E. The threaded rod b is provided at its upper end with a handle or hand-wheel, K, by which it is rotated in either direction to effect the vertical adjustment of the crosspiece F. The guard H is attached to the slidin crosspiece F by means of the springs G G which pass freely through slots therein, being held 'or fastened in any desired position by the thumb-screws c c, Fig. 3. The guard is fastened to the outer ends of the springs G G by the screws or bolts 6 c. The guard is preferably made of wood, being recessed out on its inner side, as represented in the drawings, and its lower edge, which bears on the work, being curved or rounded, as represented in (X0 model.)

the front view, 1. The vertical position of the guard is adjusted by turning the handwheel K, as represented by the dotted lines H K in the side elevation, Fig. 2-, so as to adapt the device to any thickness of the work I or form J. As the wor c and form are passed through beneath the guard H, the springs G G will yield upward slightly, to compensate for variations in the thickness of different pieces of work of the same kind or for any irregu larities in the surface thereof.

produced by the guard H on the work serves to steady the latter and hold it in place under the action of the knives on the molding-head, thereby insuring a better quality of work than is usually produced by this class of machines, while the guard effectually prevents accidents to the operator from contact with the knives.

The guard may be shifted into various positions relatively to the cutter, as shown by the dotted lines H H", Fig. 1, to suit any particular class oi" work.

By having a number of holes in the table for the bolt a the distance of the foot and standards from the head may also be varied, and the guard arranged in any desired relation to the head.

I am aware that guards of various kinds provided with springs have been heretofore combined with circular saws; but I am not aware that yielding guard has been employed in connection with a molding-machine, as herein described, being arranged to bear on the work opposite the cutter, and to steady or hold the same in place while passing by the cutter, by the friction produced between the guard and the work or the pattern and the table of the machine.

I have demonstrated by practical experience that an operator can produce double the amount of work by the use of my improvement, in consequence of the fact that the work is steadied by the pressure of ti e guard during the cutting operation, and the workman is thereby more or less completely relieved from the necessity of bearing down on the work to hold it against the table. Furthermore, by he use of my improvement, some The friction kinds of work can be done which the operthe table in rear of the head, and having its 10 ator would hardly dare to undertake withlower edge constructed to bear on the Work out it. i opposite the head,and operating to steady the I claimi work during the cutting operation, substan- The combination,with amolding cutter-head I tially as and for the purposes set forth. revolving on a vertical shaft above a suitable I THOMAS HARPS. work-supporting table, of the yielding guard Vitnesses: H, supported between the operator and the 1 WM. H. \VALKER,

j head by one or more springs, G, attached to l GEO. B. SELDEN. 

